JPH0520497Y2 - - Google Patents
Info
- Publication number
- JPH0520497Y2 JPH0520497Y2 JP2278688U JP2278688U JPH0520497Y2 JP H0520497 Y2 JPH0520497 Y2 JP H0520497Y2 JP 2278688 U JP2278688 U JP 2278688U JP 2278688 U JP2278688 U JP 2278688U JP H0520497 Y2 JPH0520497 Y2 JP H0520497Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- sealing material
- groove
- sealing
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003566 sealing material Substances 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 12
- 239000003677 Sheet moulding compound Substances 0.000 description 5
- 238000000748 compression moulding Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000004412 Bulk moulding compound Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案はシートモールデイングコンパウンド
（SMC）やバルクモールデイングコンパウンド
（BMC）の圧縮成形に使用される金型に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a mold used for compression molding of sheet molding compound (SMC) and bulk molding compound (BMC).
（従来の技術）
SMCやSBCを圧縮成形する際、なんらの手段
をも講じない場合には、空気の巻き込み等に起因
して成形品にピンホールが発生しやすく、そこで
これを防止するため、たとえば実開昭62−166010
号公報に示されているように、上下型の間隙をシ
ールして金型キヤビテイを減圧することが行われ
ている。これを第１０図に基づいて説明すると、
同図において、１は上型、２は下型、３は下型２
に設置されたSMCで、金型キヤビテイを形成す
る下型２のキヤビテイ面の外周には溝４が形成さ
れ、溝４にはシールゴム５が接着剤によつて固定
されている。(Prior art) When compression molding SMC or SBC, if no measures are taken, pinholes are likely to occur in the molded product due to air entrainment, etc. To prevent this, For example, Utsukai Showa 62-166010
As shown in the publication, the pressure in the mold cavity is reduced by sealing the gap between the upper and lower molds. To explain this based on Figure 10,
In the figure, 1 is the upper mold, 2 is the lower mold, and 3 is the lower mold 2.
In the SMC installed in the mold cavity, a groove 4 is formed on the outer periphery of the cavity surface of the lower die 2 that forms the mold cavity, and a sealing rubber 5 is fixed to the groove 4 with an adhesive.
このような金型において、圧縮成形のため上型
１を下降させると、第１１図に示すように上型１
の突起部６がシールゴム５に喰い込むため、減圧
下にある金型キヤビテイの気密性が保持される。 In such a mold, when the upper mold 1 is lowered for compression molding, the upper mold 1 is lowered as shown in FIG.
Since the protrusion 6 bites into the seal rubber 5, the airtightness of the mold cavity under reduced pressure is maintained.
しかし上記のような金型では溝４をキヤビテイ
面の外周に設けるため、金型の寸法を大にせざる
をえず、重量も増加するため、金型の加工に時間
がかかるばかりか金型の素材である鋼材の費用も
かさむものとなつていた。 However, in the above mold, the groove 4 is provided on the outer periphery of the cavity surface, which necessitates increasing the size of the mold and increasing the weight. The cost of the steel material was also increasing.
そこで特開昭60−247516号公報に示されている
ように、金型の周面に溝を形成し、この溝に一体
成形のＯ−リングをはめこむことが提案されてい
る。これを示すのが第１２図で、７は下型、８は
下型のコア部周面に形成された溝で、溝８にＯ−
リング９がはめこまれている。７ａは上型で、上
型７ａにはキヤビテイ７ｂと連通する真空引き孔
７ｃが形成されている。 Therefore, as shown in Japanese Patent Application Laid-Open No. 60-247516, it has been proposed to form a groove on the peripheral surface of the mold and fit an integrally formed O-ring into the groove. This is shown in Fig. 12, where 7 is a lower mold, 8 is a groove formed on the circumferential surface of the core part of the lower mold, and groove 8 is O-
Ring 9 is fitted. 7a is an upper mold, and a vacuum hole 7c communicating with the cavity 7b is formed in the upper mold 7a.
（考案が解決しようとする課題）
上記のような従来例では、金型の周の長さが一
定の場合には、あらかじめ一体成形した無端の標
準Ｏ−リングでことたりるが、金型の周の長さは
製品に応じて任意に変えられるため、標準品では
寸法が合わず、このためその都度直線状のシール
材を、金型の周の長さに応じて適当長さに切断
し、両端部を接合することによりＯ−リングを作
製しているが、このように一体成形によることな
く両端部を接合して作製されたＯ−リングの接合
部は接合強度が弱く、したがつてＯ−リングに十
分な張力を与えることができないため、Ｏ−リン
グにたるみが生じ、十分なシール機能が得られな
い、という問題があつた。(Problem to be solved by the invention) In the conventional example described above, if the circumferential length of the mold is constant, an endless standard O-ring molded in advance can be used; Since the circumferential length can be changed arbitrarily depending on the product, standard products do not match the dimensions, so we cut the straight sealing material to an appropriate length depending on the circumferential length of the mold each time. , an O-ring is manufactured by joining both ends, but the joint of an O-ring manufactured by joining both ends without integral molding has a weak joint strength. Since sufficient tension cannot be applied to the O-ring, there is a problem in that the O-ring becomes sagging and a sufficient sealing function cannot be obtained.
本考案は、上記問題点を解決するためになされ
たもので、十分な気密機能を発揮するシール材を
備えた金型を得ることを目的とする。 The present invention was made in order to solve the above problems, and its purpose is to obtain a mold equipped with a sealing material that exhibits a sufficient airtight function.
（課題を解決するための手段）
上記目的を達成するための本考案に固有の構成
は次のとおりである。(Means for Solving the Problems) The configuration specific to the present invention for achieving the above object is as follows.
シール用溝にはめこまれたシール材を締め付け
るために張力が付与される、シール材に埋入され
た条体と、
張力が付与された条体を型に固定する固定手段
とを有する金型。 A mold having a strip embedded in the sealing material, to which tension is applied to tighten the sealing material fitted in the sealing groove, and a fixing means for fixing the tensioned strip to the mold. .
（作用）
シール材をシール用溝にはめこんだ後、条体に
張力を付与してシール材を締め付けるため、シー
ル材にはたるみが生じない。(Function) After the sealing material is fitted into the sealing groove, tension is applied to the strip to tighten the sealing material, so no slack occurs in the sealing material.
（考案の効果）
上記のごとく、シール材にたるみが生じないた
め、シール材の気密機能が十分に発揮される。(Effect of the invention) As described above, since no sagging occurs in the sealing material, the airtight function of the sealing material is fully exhibited.
また、シール材を上下型の一方の周面に設ける
ため、金型の加工時間の短縮化が図れ、コストダ
ウンも可能になる。 Furthermore, since the sealing material is provided on one of the circumferential surfaces of the upper and lower molds, the mold machining time can be shortened, and costs can also be reduced.
さらにシール材の固定に接着剤を用いないた
め、シール材の交換が容易になる。 Furthermore, since no adhesive is used to fix the sealing material, the sealing material can be easily replaced.
（実施例）
以下本考案の実施例を図面を参照にしながら説
明する。(Example) Examples of the present invention will be described below with reference to the drawings.
第１図において、１０は下型で、下型１０の周
壁には、第２図にも示すように環状のシール用溝
１１が形成され、同溝１１にはシール材１２がは
めこまれている。１０ａは上型である。シール材
１２は第３図に示すようにゴム等の弾性体１３
と、弾性体１３に埋入された鋼線等の金属線から
なる条体１４とから構成されており、インサート
成形によつて成形される。なお、SMCを成形す
る場合等、特に耐熱性が要求される場合には、弾
性体１３としてシリコンゴムを用いる。 In FIG. 1, 10 is a lower mold, and an annular sealing groove 11 is formed in the peripheral wall of the lower mold 10, as shown in FIG. 2, and a sealing material 12 is fitted into the groove 11. There is. 10a is an upper mold. The sealing material 12 is made of an elastic material 13 such as rubber, as shown in FIG.
and a strip 14 made of a metal wire such as a steel wire embedded in an elastic body 13, and is formed by insert molding. Note that when heat resistance is particularly required, such as when molding SMC, silicone rubber is used as the elastic body 13.
第４図はシール材１２の接合部１５における拡
大図で、弾性体１３には、その傾斜する端面、つ
まり弾性体１３の接合面１６に開口するとともに
弾性体１３の上下側面に開口する導出孔１７が形
成されている。この導出孔１７は条体１４と同数
設けられている。下型１０の周面には、導出孔１
７の延長方向にのびる案内溝１８が形成され、同
溝１８の終端部には条体１４を固定するためのビ
ス１９が螺合されている。 FIG. 4 is an enlarged view of the joint part 15 of the sealing material 12, and the elastic body 13 has a lead-out hole that opens at the inclined end surface, that is, the joint surface 16 of the elastic body 13, and opens at the upper and lower side surfaces of the elastic body 13. 17 is formed. The number of outlet holes 17 is the same as the number of stripes 14. The lower mold 10 has a lead-out hole 1 on its circumferential surface.
A guide groove 18 is formed extending in the direction in which the strip 14 extends, and a screw 19 for fixing the strip 14 is screwed into the terminal end of the groove 18.
つぎに上記シール材１２を締め付ける場合につ
いて述べる。まずシール材１２をシール用溝１１
にはめこんだ後、接合面１６において互いに対向
する一対の条体１４を互いに一回より合せた後、
各条体１４の先端部に図示しない針を取り付け、
対向する接合面１６に開口する導出孔１７を貫通
させ、ついで各条体１４にこれらの導出方向に張
力を付与して接合面１６を互いに密着させる。こ
の後条体１４を案内溝１８に沿わせ、張力を付与
した状態でビス１９により条体１４を固定する。 Next, the case of tightening the sealing material 12 will be described. First, apply the sealing material 12 to the sealing groove 11.
After fitting, the pair of strips 14 facing each other at the joint surface 16 are twisted together once, and then
A needle (not shown) is attached to the tip of each strip 14,
A lead-out hole 17 opened in the facing joint surfaces 16 is penetrated, and then tension is applied to each strip 14 in the direction of the lead-out, so that the joint surfaces 16 are brought into close contact with each other. After this, the strip 14 is aligned along the guide groove 18 and fixed with the screw 19 under tension.
第５図はシール用溝１１が屈曲し、この屈曲個
所にシール材１２の接合面１５が位置している場
合を示すもので、この場合にも上記と同様の導出
孔１７を設けるが、導出孔１７の伸長方向を各条
体１４の延長方向とほぼ一致させる。 FIG. 5 shows a case where the sealing groove 11 is bent and the joint surface 15 of the sealing material 12 is located at this bent point. In this case as well, the same lead-out hole 17 as above is provided, but the lead-out hole 17 is provided. The extending direction of the hole 17 is made to substantially match the extending direction of each strip 14.
シール材１２の締め付けに際しては、第６図に
示すように各条体１４をより合せることなくその
まま条体１４の延長方向にのびる導出孔１７に条
体１４を貫通させ、ついで各条体１４にその延長
方向沿いの張力を付与して接合面１６を互いに密
着させる。この後の工程は上記と同様である。 When tightening the sealing material 12, as shown in FIG. Tension is applied along the direction of extension to bring the joining surfaces 16 into close contact with each other. The subsequent steps are the same as above.
第７図はシール用溝１１が曲線状に折曲し、か
つシール材１２の接合部１５がこの折曲個所に位
置している場合を示すもので、この場合には第８
図に示すように、各体１４がはしご状に形成され
たシール材１２を用い、弾性体１３から露出した
条体１４の露出部１４ａに曲率半径外方向を向く
張力を付与する。ここに弾性体１３から露出した
露出部１４ａとはいわばはしごの足掛部に相当す
る交差部１４ｂの端部のことで、交差部１４ｂは
リング状に形成されており、張力を付与すること
により下型１０に形成された案内孔２０を貫通さ
せることが可能であり、案内孔２０から導出され
た露出部１４ａは、第９図に示すように下型１０
に開設された開口部２１内でビス１９により下型
１０に固定される。 FIG. 7 shows a case where the sealing groove 11 is bent into a curved line and the joint 15 of the sealing material 12 is located at this bending point.
As shown in the figure, using the sealing material 12 in which each body 14 is formed in the shape of a ladder, tension is applied to the exposed portion 14a of the strip 14 exposed from the elastic body 13 in the outward direction of the radius of curvature. The exposed part 14a exposed from the elastic body 13 is the end of the intersection part 14b, which corresponds to the footrest of a ladder.The intersection part 14b is formed in a ring shape, and by applying tension, It is possible to pass through a guide hole 20 formed in the lower mold 10, and the exposed portion 14a led out from the guide hole 20 is inserted into the lower mold 10 as shown in FIG.
It is fixed to the lower die 10 with screws 19 within an opening 21 formed in the lower die 10 .
第１図は本考案に係る金型の斜視図、第２図は
シール用溝の断面図、第３図はシール材の斜視
図、第４図は接合部の拡大図、第５図は本考案の
第２実施例の斜視図、第６図は第５図の接合部の
拡大図、第７図は本考案の第３実施例を示す側面
図、第８図はシール材の斜視図、第９図は第７図
のＡ−Ａ線における断面図、第１０図は従来の金
型の断面図、第１１図は第１０図の動作説明図、
第１２図は他の従来の金型の断面図である。
１０……下型、１１……シール用溝、１２……
シール材、１４……条体、１９……ビス（固定手
段）。
Figure 1 is a perspective view of the mold according to the present invention, Figure 2 is a sectional view of the sealing groove, Figure 3 is a perspective view of the sealing material, Figure 4 is an enlarged view of the joint, and Figure 5 is the main body. FIG. 6 is an enlarged view of the joint shown in FIG. 5; FIG. 7 is a side view of the third embodiment of the invention; FIG. 8 is a perspective view of the sealing material; 9 is a sectional view taken along the line A-A in FIG. 7, FIG. 10 is a sectional view of a conventional mold, and FIG. 11 is an explanatory diagram of the operation of FIG. 10.
FIG. 12 is a sectional view of another conventional mold. 10... Lower mold, 11... Seal groove, 12...
Sealing material, 14...stripe body, 19...screw (fixing means).
Claims (1)
れたシール用溝と、 該シール用溝にはめこまれる弾性体からなるシ
ール材と、 該シール材を締め付けるために張力が付与され
る、シール材に埋入された条体と、 張力が付与された前記条体を前記一方の型に固
定する固定手段とを有することを特徴とする金
型。[Scope of claim for utility model registration] A sealing groove formed on the circumferential surface of either the upper mold or the lower mold, a sealing material made of an elastic body fitted into the sealing groove, and tightening the sealing material. A mold comprising: a strip embedded in a sealing material to which a tension is applied; and a fixing means for fixing the tensioned strip to the one mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2278688U JPH0520497Y2 (en) | 1988-02-23 | 1988-02-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2278688U JPH0520497Y2 (en) | 1988-02-23 | 1988-02-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01127817U JPH01127817U (en) | 1989-08-31 |
| JPH0520497Y2 true JPH0520497Y2 (en) | 1993-05-27 |
Family
ID=31241211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2278688U Expired - Lifetime JPH0520497Y2 (en) | 1988-02-23 | 1988-02-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0520497Y2 (en) |
-
1988
- 1988-02-23 JP JP2278688U patent/JPH0520497Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01127817U (en) | 1989-08-31 |
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